Braintrust

Top LLM Observability and Evaluation Platforms in 2026: Langfuse, LangSmith, Braintrust, Arize, and More Compared

LLM applications fail in ways traditional software does not, so observability and evaluation platforms have become core infrastructure. This article compares leading platforms across tracing, evals, and production monitoring, with market data showing growth to $2.69 billion in 2026. Key players include Langfuse, LangSmith, Braintrust, Arize, and MLflow.

Langfuse LangChain Braintrust Arize AI MLflow Datadog New Relic Dynatrace